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The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475
Yang, Y. -G.1,2; Wei, J. Y.1; Li, H. -L1
2010
发表期刊NEW ASTRONOMY
卷号15期号:1页码:155-158
摘要CCD photometric observations of the shortest period field contact binary, GSC 1387-0475, obtained in the observing season in 2008-2009, are presented. From new observations, eleven light minimum times were derived and the orbital period was revised. The light curves in BVR bands were analyzed using the W-D program. It is found that GSC 1387-0475 is an overcontact binary. The derived absolute physical parameters of this binary are: M(p) = 0.443(+/- 0.004)M(circle dot), M(s) = 0.210(+/- 0.003)M(circle dot), R(p) = 0.658(+/- 0.008)R(circle dot), R(s) = 0.496(+/- 0.011)R(circle dot), L(p) = 0.188(+/- 0.005)L(circle dot), and L(s) = 0.090(+/- 0.004)L(circle dot). From the LogL-LogM diagram, the primary component is found to be an evolved star. The additional component of GSC 1387-0475 may remove angular momentum from the central system. With the angular momentum decreasing, the separation between components may decrease, which will cause the inner and out critical Roche lobes to shrink, resulting in an increase degree of overcontact. Finally, GSC 1387-0475 with a deep overcontact degree (i.e., f = 76.3 +/- 2.9%) may evolve into a rapid-rotating single star. (C) 2009 Elsevier B.V. All rights reserved.
关键词Binaries: Eclipsing Binaries: Close Individuals: Gsc 1387-0475-stars: Multiple
DOI10.1016/j.newast.2009.07.009
收录类别SCI
语种英语
WOS记录号WOS:000270638000022
引用统计
被引频次:7[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7765
专题空间科学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Huaibei Coal Ind Teachers Coll, Sch Phys & Elect Informat, Huaibei 235000, Anhui, Peoples R China
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Yang, Y. -G.,Wei, J. Y.,Li, H. -L. The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475[J]. NEW ASTRONOMY,2010,15(1):155-158.
APA Yang, Y. -G.,Wei, J. Y.,&Li, H. -L.(2010).The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475.NEW ASTRONOMY,15(1),155-158.
MLA Yang, Y. -G.,et al."The absolute properties and evolutionary state for the shortest period field contact binary GSC 1387-0475".NEW ASTRONOMY 15.1(2010):155-158.
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